某校九年级一班体育委员在一次体育课上记录了六位同学托排球的个数分别为37，25，30，35，28，25，这组数据的中位数为（ ）

求值：log₂3•log₅7•log₃5•log₇4=____ 

阅读短文，从每小题所给的四个选项中，选出能回答所提问题的最佳答案。

    There are fifty students in our class. There are twenty-four boys and twenty-six girls. Some students live near the school, and some others live far from school. About half of the students usually come to school by bike. They often get to school at a quarter to seven. About fifteen students often come to school by bus. They often get to school very early, too. Another ten students come to school on foot. Their homes are near the school, but they are often late for school, because they get up late.

阅读短文，下列问题

Jane Goodall is a famous scientist. For more than 40 years, Goodall lived mostly in Tanzania in East Africa, studying chimpanzees.

    As a young child, Jane Goodall was interested in animals. She grew up in the English countryside and was always climbing trees or riding horses.

When Jane was 23, she got a chance to go to Africa even though she had never been to college，she got a job with a famous scientist named Louis Leakey.

One day Louis Leakey said he needed a volunteer. He needed someone to go to a lake in Tanzania to study a kind of chimpanzees. Jane was excited.

    On July 16,1960, she began her exploration（探索）. At first, the chimpanzees ran away from Jane. But with time passing，they got used to her being around.

    Every day，Jane would follow the chimpanzees，taking notes on their behavior. She learned many new things about chimpanzees. She watched how a chimpanzee made a tool. She learned how some chimpanzees became good leaders. She watched how mother chimpanzees raised their children. She watched animals get angry and get upset. She wrote everything down so others would understand animals as she did. She learned that if you pay really close attention to animals，you will understand what they are “saying”.